Machine for rolling beads in stovepipe casings



1 8, 1930.y T. A. M. PETERSEN 1:75078-4 MACHINE FOR ROLLING BEADS IN STOVEPIVPE CASINGS #from/Ey March 18,V 1930. T. A. M. PETERSEN MACHINE FOR ROLLING BEADS IN STOV-EPIPE CASINGS Filed Feb. 13N, 1929 3 Sheets-Sheet 2 March 18, 1930. T. A. M. PETl-:RsEN 1,750,784

I MACHINE FOR ROLLING BEADS IN STOVEPIPE CASINGS Filed Feb. 1s, 1929 3 sheets-sheet 3 14 rvoervex Patented Mar. 18, 1930 narran rasant THORVALD A. M. PETERSEN, OF LOS AN (rELES,V CALIFORNIA, ASSIGNOR-TO UNION TANK & PIPE CO., OF LOSANGELES, CALIFORNIA, ACORPORATION OF CALIFORNIA Application led February 13, 1929. Serial No. 339,576.

This invention relates to apparatus for forming annular beads in stovepipe casing, such as used in an oil-well.

Stovepipe casing as manufactured at present comprises inner and outer layers of sheet metal which are rolled into cylindrical form and are secured axially together either by riveting or by forming inter-engaging corrugat-ions in the inner and outer layers after they have been placedtogether.

The forming of corrugations in stovepipe casing has been found themost practical, for While riveting produces a casing that has ample compressive strength, the linear tensile strength of such riveted casing is inadequate to stand the strain of supporting five hundred to several thousand feet of casing, which is necessary in the installation of casing in a well.

Ordinarily, the annular corrugations or beads are formed in stovepipe casings by a hammer having a. recess formed thereon, and a die having a bead formed thereon. These members constitute part of a' hammering mechanism, the hammer of which` is reciprocated while the stovepipe casing is rotated until an annular bead is completed.

yThe disadvantage of using hammering apparatus is that it takes too much time to form a corrugation and the corrugation is not as satisfactory as it might be.

It is an object of my invention to provide apparatus for rolling an annular bead in stovepipe casing.

It is a further object of my invention to provide an apparatus having rotating members provided with mating concave and conveX surfaces for forming annular corrugations in well casing.

It is a still further object of my invention to provide apparatus of the character described in which pressure is transmitted to bead forming rollers during the rolling operation.

It is another object of my invention to provide means for increasing and decreasing the space between related rolling members. It is a still further object of my invention to provide an apparatus of the character described, providing means for driving and means for synchronizing the bead forming l rollers of the invention.

Other objects of my invention will be apparent from a perusal of the following speciiication, the accompanying drawings andthe appended claims.

' Referring to the drawings in which my invention is illustrated: f

Fig. 1 is a side elevation of the apparatus embodying my invention. v

Fig. 2 is an end elevation of the apparatus, taken as indicated by the arrow 2 of Fig. 1.

Fig. 3 is an elevation taken as indicated by the arrow 3 of Fig. 1.

Fig. 4 is a sectional view taken as indicated by the line 4 4 of Fig. 1.

Fig. 5 is a sectional view taken as indicated by the line 5-5 of Fig. 1. y Fig. 6 is a sectional view taken as indicated by the line 6-6 of Fig. 5.

Fig. 7 is a section of a stovepipe casing showing ythe utility of the invention.

In the drawings I show a main supporting frame 11, comprisinga base 12 and an upper supporting arm 13. The base 12 provides a bore 14 retaining one end of a mandrel 15, the yother end of which protrudes from the base 12 at right angles thereto, directlybelow and parallel with the arm 13. The mandrel 15 is provided with a longitudinal boreV 16 through which a shaft 17 extends. The

shaft 17 is supported at its inner end by a.V

bushing 19 pressed into the bore 16. The shaft 17 extends through the bushing a suf-` ficient distance to accommodate a gear 2O and one of a pair of reduction gears 21, both of which are keyed to the shaft 17. The gear 21 meshes with a pinion 22, which is keyed to a stub shaft 23. The shaft 23 is supported by the frame 11 as shown in Figs. 2 and3. Mounted on the end of the stub shaft23 isa tight and loose pulley arrangement driven from a source of power, not shown.

I will now refer to the more pertinent details of my invention. Y

The outer end 24 of the shaft 17 is support-` ed by a pair of ball bearings 25, which are pressed within a recess 26 in the outer .end 27 of the mandrel 15. The bearings 25 are spaced apart by a spacing sleeve 28 to'proanvoil chamber 29. The Vbearings 25 and the sleeve28 are retained within the recess 26 by a nut 3,0, threadedly engaging interior threads K .31 in the outer end 27 of the mandrel 15. kThe nut 30 yis provided withanannular'groove 32 'f to retain a packing 33and is also provided withwrench engaging notches 34 in the outer I face thereof. f 1o' Extending outward from* the end' 27 of the mandrel isa 'reduced' portionV 35 of the shaft 17 ,the reduced portion-providing a shoulder 36. Keyed to the reduced portion 35 of the Y a shaft 17 and bearing against the Yshoulder 36 is a thimble 37, comprising a cylindrical body portion 38- and a flange 39. f

VAdapted to be carried onthe bodyportion 1,38 1ofthe'thi1nble`37 isa primary rolling meinber 40 vof the invention', having an annular k bead 41 ,onA thev periphery'thereof. f A; Vretainingv lplate 42 is placed against Vthe rolling member 40, andthe plate 42, the'rolling mem 'ber 40, and the flanges 39Vof the thimble 37 f are 'held together bypins 43. The thiinble 37 ,d s

the.V rollingmember 40, and theretainingpdisk 42'constitute a'rolleras'sembly that is readilyA l detachable from the'shaft 17 by the removal 'of a locking nut 44 which engages a threaded portion 45 on the outer end of the shaft 17 and be'arsf'against, the outer end 46 of the thimble 37.

"f'Directly above, and in parallellrelation withthe'shaft 17, isia shaft 47, extending through airenlarged bore 48 in the upper por7 tion of the-base 12; On the inner end'47 f ofthe shaft 47 is keyed a gear 49 which meshes i Y loosely Withthe gear20. The inner end 47 of the shaft is supported by a pivot ,bearing 50,;comprising avbearing portion 51 and.` pins 52 which are suspended vin the bore 48., The Y n l t plate 98'vsecuredtothe body portion bycap pivot bearing and the 'loose fit between the gears20 and 49 allowliniited vertical movel Y ment'ofthesh'aft'47.2k L

The outer .end .53`of the shaft 47 carriesaV Vhead "54,1slidably retained in a UV-shaped vre- Ycess V55 formed in the' outer end' 56 ofthe sup'- i i portingfmember'13. Thev open side ofthe by'cap-s'crews 58.

jU-shaped Vrecess 55isclosed byf aplate 5,7 held Y 5oV i' l Y The head` 54 is 'pmidaiv with a. notch' 59 deiinedby a rear Wallv60, a top Wall 61, the

outer openface of 'the notch 59 being closed by a cover'62 retained by cap-screws 63, The shaft",53'extends through :anopening 64 rin `the rear wall of the head 54'and anY opening in the coverplate 62.

KeyedV on a reduced portion 66 of the shaft l y 47 and'rotatable within the notch 59 is a secondaryrolling member 67, which is pressed against a shoulder 68 formed by the reduced threaded on the end Vofthe. shaft 47.

. The secondary rolling memberis provided with an annular groove 71 in the periphery thereof, the annularv groove 71 being verti-f Y cally alined with the annular4 bead 41 of the primary rolling'member 40.

On the upper portion ofthe head 54 is a pair oflugs72 between which one end ofv a link 73-is pivoted by a bolt 74.V

Pivotally connectedwith the upperend 75 l of the link 73 by a pin 76 are the lower free ends 77 of a pair of bell-cranks 7 8;y The bellcranks are pivotally supported inthe supporting arm 1 3 at 79, and the upper free ends 8O thereof are provided with slots 81 adapted toretain apin81a a pin and slot connection. Y Y

Y f Intermediate the ends 80 of the bell-cranks 78 and also Vpivotally'retained by the pin 81'a is an outer end 82 of a piston rod 83. The piston rod 83 ispivotally connected at itsinner g'ral'ivith a piston` 87.

end 84by a pin 85-toapair-,of lugs A86, inte- .p85

Within Yacylinder 88 and comprises aubody-^ portion '89j and a cylindrical skirt 90.- Thek body portion/890i1 thepiston 87 hasrpa'y reduced portion 91 and a shoulder `:92. 'Placed over thereduced portion 91 against the shoulperipherall flange 94, said flange extending between the periphery of the shoulder 92 and the inner Wall-ofthe cylinder 88. Placed ing member 95 is a cup washer 96 having aperiphera'l 'flange 97 extending in the opposite der 92jis a flexible cup washer 93 having a direction from the flange 94 of the cup washer 93. The cup washer 93,-thespacingmember 95, and the cup washer 96 are retained on the reduced portion '91," and pressed ag'ainstthe shoulder 92 ofthe pistonv 87 by a retaining screws 99.

n The" skirt projects through la. `eylindr'ircal bore 100 in the rod end wall 101of the cylinder 88. fThe Wall 101 is provided with "an annular recess 102 in which packing '103' is compressedfby .ai gland member 104. 4The gland member V104 is' retainedrelative tothe Y' cylinder 88 by cap-screws threadedinto'v a) flange 105 provided on the cylinder.

Connecting the 'eylinder at either side of' valve "106 are an airfsupply line l09`and an exhaust line 110..;

In the. operation of Vmy invention, atubu- L lar ymember with inner andL outer layers vof sheet metal of the type previously described is'plaCed over the mandrel 15, the wallof the tubular' member being disposed between the primary vrolling'inember 40a'n'd the second-f ary rollingmember 67, asshown atlll iin Fig. '1.

The valve 106 is then operated tocause air pressure from the supply line 109 to flow into the cylinder 88 atthe right side of the piston 87 through the line 108, and to exhaust the air contained in the cylinder 88 at the left of the piston 87 through the line 107 andthe exhaust line 110.

As the piston 87 moves in the direction of the arrow 112, Fig. 4, motion is imparted through the pistonrod 83 and the bell cranks 78, causing the link 73 to force the head 54 downward. The downward movement of the head 54 causes the secondary rolling member 67 carried thereby to exert considerable pressure on the outer surface of the tubular member 111, in the direction of the arrow 113 of Fig. 6.

rlhe downward movement of the head 54 in the recess 59 of the supporting arm 13 causes a pivotal movement of the shaft 47, pivoting in the bearing 52.

This slight pivotal movement of the shaft 47 and the secondary rolling member 67 within the recess 59 is provided for by the loose fit between the shaft 47 and the openings 64 and 65. The rolling member 67 is also loosely housed within the recess 59 of the head 54 to provide for the slight relative movement occurring between the head 54 and rolling member 67.

Rotary motion is then imparted to the primary and secondary rolling members 40 and 67 through their respective shafts 17 and 47, gears 20 and 49, the gears 21 and 22, and the tight and loose pulley.

Frictional contact between the primary and secondary rollers 40 and 67 and the tubular member 111, causes the tubular member to rotate. Suiiicient pressure is applied to the secondary rolling member 67, to cause the walls of the tubular member 111 to be pressed into conformation with the bead 41 and the groove 71 of the primary and secondary rolling members 40 and 67 to produce an annular bead in the wall of the tubular member 111, as shown at 114in Fig. 7.

After the annular bead 114 is formed in the tubular member 111, the valve 106 is again operated to raise the secondary rolling member 67 by causing the line 108 to exhaust through the line 110 and the line 107 tobe connected to the air supply line 109 to return the piston 87 in the direction of the arrow 115, Fig. 4. l

From the foregoing description, it will be seen that my invention will expeditiously roll beads in a tubular member, the actual process being about four times faster than the hammei-ing method referred to previously.

Although I have herein disclosed only one complete embodiment of my invention, it should be understood that various features might be changed and numerous embodiments thereof might be devised by those skilled in the art, without 'departingfrom the spirit and scope of my invention.

I claim as my invention:

1. In a device for rolling corrugations in a tubular member, the combination of a primary forming element; a secondary forming element; meansfor synchronously operating said elements; a supporting body; walls forming a recess in said body; a plate covering said recess and secured to said body; a head operating in said recess; walls forming a notch in said head; a cover closing one si de of said notch 'and secured to said head, said operating means extending through openings in said head and said cover, said secondary forming element secured to said operating means and operable therewith within said notch; retaining members securing said element to said operating means; a pivot bearing, said operating means supported in said pivot bearing; a gear train, said gear train synchronously operating said primary and secondary forming elements; and mechanism for moving said head and moving said element associated therewith toward or away from the other of said elements. Y

2. In a device for rolling corrugations in a tubular member, the combination of a primary forming element; a secondary forming element; means for synchronously operating said elements; a mandrel; walls forming a bore in said mandrel; operating means extending through said bore; journaling members within said bore supporting saidoperating means; a thimble and a retaining disk fastened to said primary forming-element, said primary forming element secured to said operating means and operable therewith; locking means for retaining said primary forming element and parts associated therewith to said operating means; a head for supporting said secondaryy formingv element and mechanism for moving said head and moving said element associated therewith toward or away from the other of said elements, said mechanism inclu-ding a cylinder, a piston operable in said cylinder, means for admitting compressed fluid into either end of said cylinder fori-moving said piston` and parts connecting said head and said piston.

3. In a -devicevfor rolling corrugations in a tubular member, the combination of a primary forming element; a secondary forming element; a mandrel; walls forming a bore in said mandrel; operating means extending through said bore; journaling members within said bore supporting said operating means; a thimble anda retaining disk fastened to said primary forming element, said primary forming element secured to said operating Ameans and operable therewith; locking means for retaining said primary formingv element Vand parts associated therewith to said operating means; a supporting body; walls forming a recess in saidbody; a plat-e covering said recess and secured to said body;

Y a head operating in said recess; walls-forni- Y ing a notch in said head; a cover closing one side of said notch and secured vto said head, said operating means extending through openings in said-head'faiid said cover, sa-idV secondary forming -zelement secured ato said :operating means `and operableV ltherewith .within said notch; retaining members securingsaidV element to saidoperating means; a

lpivot bearing, said operating `means support ed 4in said pivot'bearing; algeartrain, said geartrain' synchronously operating said primary and secondaryforming elements; and

mechanismfor moving said headand moving saidelement.associatedtherewith toward or vvaway from the otherof said elements..

* a tubular member, the combination of a pri-v f 4. In a device for rolling corrugations in mary forming element; a secondary forming element;a mandrel; Vwalls forming a bore inl said mandrel; operating means extending .f through saidfbore; journaling members within said bore supporting said voperating means va thimble and a retaining disk fastened to said primary formingelement; said primary formingfelement secured to saidoperating means and operable therewith; locking means for retainingv said primary forming lelement in said heady andfsaid cover, said secondary formingelement secured to said operating means and operableV therewith withinsaid' notch; retaining members securing said ele- 'ment to said operating meansva pivot Vbearing, said'operating means supported in said pivot bearing; a gear train,said gear train synchronously operating said primary and secondary Vforming elements; said secondary forming element having an annular groovein Y f the periphery thereof andsaid primaryforming element having'an annular bead on the periphery'thereof, said annular groove mating withsaid annilar bead for forming a corrugation in a tubular member; and mechanism for moving said head and moving said element associated therewith toward'or away from the other of said elements.

5.*In a device for'rolliiig corrugations in a tubularinember, thel combination of aprimary forming elementi; a secondaryfor'ming e e 0 I in said mandrel; operating means extending throughsaid bore; journaling members'within said bore supporting said operatingmeans; arthimble and-ay retaining disk-"fastened to said primary forming element, said primary forming element secured' to said' operating means and operable'therewith; locking means f or. :retaining said primary formingelement l and paitsassociated therewith to said operating means;`a supporting body; walls form ing a recessinsaidbody;` a. plate covering saidrecess and secured tosaid body; a head operating in said 7^recess walls.. forming a notch in said head; a cover closingoneside of saidnotch .and secured to said headTIsaid operating means extending through openings in said'head and said cover, saidsecondary forming element secured Yto said 'operating means and operable therewith within said notch; retaining members securing said element to said operating-means; a pivot bearing; said operating Vmeanssiipported in said pivot bearing; a gear train, said gear train w synchronously operating said-primary'and secondary. forming elements, said secondaryV fOiIning-element havingan annular groove f inthe periphery thereof and saidv primary forming elementhavingan annular bead on the pehiphery thereof, said annular groove mating with said annular bead vfor forming a l corrugation in atubular member; and Jmechanism for moving said head Vand moving said elem'ent associated therewith toward or away Y j from t-he otherof said elements,l saidmech'- anisinincluding a cylinder,V a piston operable in said .cylindenineansfor'admitting compressed iuid into' either end of said cyl;Y

inderv for moving said piston, a piston rod,

saidpiston rod connecting with said piston,

a bell-crank, said rod connecting with said crank; a link, said link connecting said bellcrank with said head,'said piston 'comprising a body, cup'washers, a retaining washer, said washe'rfsecuring said. cup .washers to saidV body,a cylindrical skirt, walls forming a bore in 'said cylinder, said skirt extending -through Y fico said bore, and a packing member, said skirt extending through said packing member.

In testimonywhereof, I have hereunto set my hand at LosAngeles, California, this 8th .day 0f February;1929 V riioiwiiiin` A. M. PETERSEN.

hizo 

